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Add bounds check to left_shift_line()

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Fixes #2710
This commit is contained in:
Kovid Goyal
2020-05-31 08:10:58 +05:30
parent 82d8c4b230
commit eacf849e3a
2 changed files with 12 additions and 11 deletions
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12
kitty/lineops.h
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@@ -54,6 +54,18 @@ line_reset_cells(Line *line, index_type start, index_type num, GPUCell *gpu_cell
memcpy(line->cpu_cells + start, cpu_cells + start, sizeof(CPUCell) * num);
}
static inline void
left_shift_line(Line *line, index_type at, index_type num) {
for (index_type i = at; i < line->xnum - num; i++) {
COPY_CELL(line, i + num, line, i);
}
if (at < line->xnum && ((line->gpu_cells[at].attrs) & WIDTH_MASK) != 1) {
line->cpu_cells[at].ch = BLANK_CHAR;
line->gpu_cells[at].attrs = BLANK_CHAR ? 1 : 0;
clear_sprite_position(line->gpu_cells[at]);
}
}
typedef Line*(get_line_func)(void *, int);
void line_clear_text(Line *self, unsigned int at, unsigned int num, char_type ch);
void line_apply_cursor(Line *self, Cursor *cursor, unsigned int at, unsigned int num, bool clear_char);